At the end of 2013, Italy had 60,782,668 inhabitants.[139] The resulting population density, at 202 inhabitants per square kilometre (520/sq mi), is higher than that of most Western European countries. However, the distribution of the population is widely uneven. The most densely populated areas are the Po Valley (that accounts for almost a half of the national population) and the metropolitan areas of Rome and Naples, while vast regions such as the Alps and Apennines highlands, the plateaus of Basilicata and the island of Sardinia are very sparsely populated.